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([110.9.142.4]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2d0aa4d67dcsm9219905ad.70.2026.08.04.08.12.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 04 Aug 2026 08:12:30 -0700 (PDT) From: Sang-Heon Jeon To: Andrew Morton , David Hildenbrand , Mike Rapoport , Vlastimil Babka Cc: Brendan Jackman , Johannes Weiner , "Liam R. Howlett" , linux-kernel@vger.kernel.org, linux-mm@kvack.org, Lorenzo Stoakes , Michal Hocko , Suren Baghdasaryan , Zi Yan Subject: [PATCH v2 0/2] mm/page_ext: remove pgdat_page_ext_init() Date: Wed, 5 Aug 2026 00:11:40 +0900 Message-ID: <20260804151145.3419768-1-ekffu200098@gmail.com> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hello, pgdat_page_ext_init() has no effect on FLATMEM. The pgdat is always the zero-initialized contig_page_data, because no architecture supports FLATMEM + NUMA. That constraint is only implicit in the arch Kconfig files. So patch 1 makes it explicit in mm/Kconfig, and patch 2 removes pgdat_page_ext_init(). No functional change. --- Changes from v1 [1] - Add patch 1 to make FLATMEM depend on !NUMA [1] https://lore.kernel.org/all/20260803134822.2568766-1-ekffu200098@gmail.com/ --- Sang-Heon Jeon (2): mm/Kconfig: make FLATMEM depend on !NUMA mm/page_ext: remove pgdat_page_ext_init() include/linux/page_ext.h | 5 ----- mm/Kconfig | 2 ++ mm/mm_init.c | 1 - mm/page_ext.c | 9 --------- 4 files changed, 2 insertions(+), 15 deletions(-) -- 2.43.0